A 400 ml aerosol can with a blue overcap, labelled Artists' Clear Picture Varnish and marked for oil and acrylic colour. The German line on the same label reads Künstlerfirnis glänzend, so the finish this can lays down is a gloss rather than a matt one, and the cap itself carries printed instructions for lining up the arrows and lifting it off.

The case for spraying rather than brushing comes down to what a brush does to a finished surface. A brush drags, and on impasto or textured paint it bridges the high points and pools in the low ones, leaving the varnish thick where the paint is thin. An aerosol never touches the picture: the mist settles into the texture evenly, and a heavily worked surface gets the same film as a flat one.

Technique is almost the whole product. Hold the can about a foot from the work, start the pass off the edge of the canvas, sweep straight across and release after the far edge, then come back the other way with the next pass overlapping the last. Several light coats beat one heavy one every time, because a heavy coat is what runs, and a run in varnish sets as a ridge you cannot sand out of a painting.

Wait longer than you think before the first pass. Acrylic keeps curing for days after it is touch-dry and oil paint for far longer, and sealing a film that has not finished moving is what clouds a varnish or cracks it later. Work outdoors or with the windows and a fan going, wear a mask, and never spray in a small closed room.

Weather matters here too. Spraying in strong direct sun dries the mist before it can level, leaving a dusty texture instead of a film, and spraying in very humid air can bloom the coat to a milky haze. Early morning or evening, out of the sun, is the sensible window in most Pakistani cities.

Between this can and the 75 ml brush-on bottle in the same range, the choice is about the work rather than the price. Small boards, a smooth surface and a room with no space to spray point to the brush bottle. Textured canvases, several pieces in one session and anything where brush marks would show point to this can.

The Safencia price is Rs. 5,200 for the 400 ml can. Cash on Delivery is available across Pakistan, and stock, your city and delivery charges are confirmed on WhatsApp before dispatch.

Why this product is worth considering